Air Force Funds Both AR1 and BE-4 Rocket Engine Development to Replace ULA's Russian RD-180

BE-4 methane engine components undergo hot-fire test at the Bezos West Texas test site. Photo Credit: Blue Origin

The U.S. Air Force (USAF) decision to continue funding both the Aerojet Rocketdyne AR1 and the Blue Origin BE-4 engines will end United Launch Alliance (ULA) dependance on the Russian RD-180 for the Atlas-V rocket and […]